add mariadb

.github/workflows/test.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       matrix:
         ruby: ['3.3', '3.2', '3.1']
-        database: ['sqlite', 'mysql', 'postgres']
+        database: ['sqlite', 'mysql', 'postgres', 'mariadb']
     services:
       mysql:
         image: mysql:8.0
@@ -32,6 +32,13 @@ jobs:
           POSTGRES_USER: postgres
           POSTGRES_PASSWORD: postgres
           POSTGRES_DB: test
+      mariadb:
+        image: 'mariadb:11'
+        env:
+          MARIADB_ROOT_PASSWORD: root
+          MARIADB_DATABASE: test
+        ports:
+          - 3306:3306
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -47,10 +54,13 @@ jobs:
             echo "DATABASE_URL=sqlite3::memory:" >> $GITHUB_ENV
             ;;
           mysql)
-            echo "DATABASE_URL=mysql://root:root@localhost/test" >> $GITHUB_ENV
+            echo "DATABASE_URL=mysql://root:root@localhost:3306/test" >> $GITHUB_ENV
             ;;
           postgres)
-            echo "DATABASE_URL=postgres://postgres:postgres@localhost/test" >> $GITHUB_ENV
+            echo "DATABASE_URL=postgres://postgres:postgres@localhost:5432/test" >> $GITHUB_ENV
+            ;;
+          mariadb)
+            echo "DATABASE_URL=mariadb://root:root@localhost:3306/test" >> $GITHUB_ENV
             ;;
           esac
       - name: Test

README.md

@@ -7,8 +7,8 @@ Use `union_of` to create unions of other associations in Active Record, using a
 SQL `UNION` under the hood. `union_of` has full support for joins, preloading,
 and eager loading of union associations.
 
-We currently support PostgreSQL and MySQL. We'd love contributions that add
-SQLite support, but we probably won't add it ourselves.
+We currently support PostgreSQL, MySQL, and MariaDB. We'd love contributions
+that add SQLite support, but we probably won't add it ourselves.
 
 This gem was extracted from [Keygen](https://keygen.sh) and is being used in
 production to serve millions of API requests per day.
@@ -99,9 +99,9 @@ your tables are indexed well. We have tried to make the underlying `UNION`
 queries as efficient as possible, but please open an issue or PR if you are
 encountering a performance issue that is caused by this gem.
 
-We use Postgres in production, but we do not actively use MySQL so there may be
-performance issues we are unaware of. If you stumble upon issues, please open
-an issue or a PR.
+We use Postgres in production, but we do not actively use MySQL or MariaDB, so
+there may be performance issues we are unaware of. If you stumble upon issues,
+please open an issue or a PR.
 
 ## Supported Rubies